llvm dev - May 2015 - [LLVMdev] How to determine the architecture that clang/llvm will compile in CMake.

I've been working on getting the LLVM OpenMP library to build smoothly
alongside llvm/clang using CMake, but one problem I'm having is determining
exactly which CMake option designates the architecture the compiler will
compile.  I see LLVM_TARGET_ARCH, LLVM_TARGETS_TO_BUILD,
LLVM_DEFAULT_TARGET_TRIPLE, etc.

I thought I should just ask which one designates the architecture the compiler
will build, but I wouldn't mind an explanation for all of them :)

And yes, I've looked at http://llvm.org/docs/CMake.html, but am still
confused.

Any help is greatly appreciated!
-- Johnny

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Hi,

The default CMake options produce a compiler that is capable of targeting all
the architectures that were present in the source tree. The list of supported
architectures can be reduced using LLVM_TARGETS_TO_BUILD in case you want to
save disk-space, compilation-time, etc.. The default architecture targeted by
the resulting compiler is specified by LLVM_TARGET_ARCH and
LLVM_DEFAULT_TARGET_TRIPLE.

Hope that helps.

From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of Peyton, Jonathan L
Sent: 22 May 2015 19:12
To: llvmdev at cs.uiuc.edu
Subject: [LLVMdev] How to determine the architecture that clang/llvm will
compile in CMake.

I've been working on getting the LLVM OpenMP library to build smoothly
alongside llvm/clang using CMake, but one problem I'm having is determining
exactly which CMake option designates the architecture the compiler will
compile.  I see LLVM_TARGET_ARCH, LLVM_TARGETS_TO_BUILD,
LLVM_DEFAULT_TARGET_TRIPLE, etc.

I thought I should just ask which one designates the architecture the compiler
will build, but I wouldn't mind an explanation for all of them :)

And yes, I've looked at
http://llvm.org/docs/CMake.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_docs_CMake.html&d=AwMFAg&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=y71jwqIExOpM3n490cz13SVJmybYCml5fWmWLCtYDQc&s=ufiTk8h8xDI8qA2S1uu1O39smCzzKWdbMH3ys2M-Cdw&e=>,
but am still confused.

Any help is greatly appreciated!
-- Johnny

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Thank you. It does help!

-- Johnny

From: Daniel Sanders [mailto:Daniel.Sanders at imgtec.com]
Sent: Tuesday, May 26, 2015 5:14 AM
To: Peyton, Jonathan L; llvmdev at cs.uiuc.edu
Subject: RE: [LLVMdev] How to determine the architecture that clang/llvm will
compile in CMake.

Hi,

The default CMake options produce a compiler that is capable of targeting all
the architectures that were present in the source tree. The list of supported
architectures can be reduced using LLVM_TARGETS_TO_BUILD in case you want to
save disk-space, compilation-time, etc.. The default architecture targeted by
the resulting compiler is specified by LLVM_TARGET_ARCH and
LLVM_DEFAULT_TARGET_TRIPLE.

Hope that helps.

From: llvmdev-bounces at cs.uiuc.edu<mailto:llvmdev-bounces at
cs.uiuc.edu> [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Peyton,
Jonathan L
Sent: 22 May 2015 19:12
To: llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>
Subject: [LLVMdev] How to determine the architecture that clang/llvm will
compile in CMake.

I've been working on getting the LLVM OpenMP library to build smoothly
alongside llvm/clang using CMake, but one problem I'm having is determining
exactly which CMake option designates the architecture the compiler will
compile.  I see LLVM_TARGET_ARCH, LLVM_TARGETS_TO_BUILD,
LLVM_DEFAULT_TARGET_TRIPLE, etc.

I thought I should just ask which one designates the architecture the compiler
will build, but I wouldn't mind an explanation for all of them :)

And yes, I've looked at
http://llvm.org/docs/CMake.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_docs_CMake.html&d=AwMFAg&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=y71jwqIExOpM3n490cz13SVJmybYCml5fWmWLCtYDQc&s=ufiTk8h8xDI8qA2S1uu1O39smCzzKWdbMH3ys2M-Cdw&e=>,
but am still confused.

Any help is greatly appreciated!
-- Johnny

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